Upgrade 2.2.06 to 2.4

Hi all. It's been awhile. I have version 2.2.06 and am thinking about upgrading to v2.4. Is this possible? Just go straight to v2.4 and update? I have built up a great customer base and do not want to lose them if this upgrade goes awry! It looks like this is the 6th update since my version.

I don't need the latest version mine is working fine. But I thought perhaps I could get some added benefits, security, and perhaps increased database speed with the newer version.